按照工資公升序，找出員工名和薪資
預設公升序排列
[bjpowernode]
>select #找出
-> ename,sal #員工名，薪資
-> from
-> emp #表名
-> order by #排序關鍵字
-> sal;
#通過這個排序
+--------+---------+
| ename | sal |
+--------+---------+
| smith | 800.00 |
| james | 950.00 |
| adams | 1100.00 |
| ward | 1250.00 |
| martin | 1250.00 |
| miller | 1300.00 |
| turner | 1500.00 |
| allen | 1600.00 |
| clark | 2450.00 |
| blake | 2850.00 |
| jones | 2975.00 |
| scott | 3000.00 |
| ford | 3000.00 |
| king | 5000.00 |
+--------+---------+
14 rows in
set(0.00 sec)
指定公升序或者降序
1. asc:表示公升序
2. desc:表示降序
[bjpowernode]
>select ename,sal from emp order by sal asc;
#公升序排列
+--------+---------+
| ename | sal |
+--------+---------+
| smith | 800.00 |
| james | 950.00 |
| adams | 1100.00 |
| ward | 1250.00 |
| martin | 1250.00 |
| miller | 1300.00 |
| turner | 1500.00 |
| allen | 1600.00 |
| clark | 2450.00 |
| blake | 2850.00 |
| jones | 2975.00 |
| scott | 3000.00 |
| ford | 3000.00 |
| king | 5000.00 |
+--------+---------+
14 rows in
set(0.00 sec)
[bjpowernode]
>select ename,sal from emp order by sal desc;
#降序排列
+--------+---------+
| ename | sal |
+--------+---------+
| king | 5000.00 |
| scott | 3000.00 |
| ford | 3000.00 |
| jones | 2975.00 |
| blake | 2850.00 |
| clark | 2450.00 |
| allen | 1600.00 |
| turner | 1500.00 |
| miller | 1300.00 |
| ward | 1250.00 |
| martin | 1250.00 |
| adams | 1100.00 |
| james | 950.00 |
| smith | 800.00 |
+--------+---------+
14 rows in
set(0.01 sec)
按照工資降序排列，工資一樣的按照名字的公升序排列
[bjpowernode]
>select ename,sal from emp order by sal desc,ename asc;
+--------+---------+
| ename | sal |
+--------+---------+
| king | 5000.00 |
| ford | 3000.00 |
| scott | 3000.00 |
| jones | 2975.00 |
| blake | 2850.00 |
| clark | 2450.00 |
| allen | 1600.00 |
| turner | 1500.00 |
| miller | 1300.00 |
| martin | 1250.00 |
| ward | 1250.00 |
| adams | 1100.00 |
| james | 950.00 |
| smith | 800.00 |
+--------+---------+
14 rows in
set(0.00 sec)
# 多個字段同時排序，越靠前的位置起的作用越大
找出工作崗位是salesman的員工，並且要求按照薪資的降序排列
[bjpowernode]
>select #最後查
-> ename,job,sal
-> from #先執行
-> emp
-> where #接下來
-> job=
'salesman'
-> order by #最後排序輸出
-> sal desc;
+--------+----------+---------+
| ename | job | sal |
+--------+----------+---------+
| allen | salesman | 1600.00 |
| turner | salesman | 1500.00 |
| ward | salesman | 1250.00 |
| martin | salesman | 1250.00 |
+--------+----------+---------+
4 rows in
set(0.00 sec)
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